Blind-lock.



E. WYER.

LOOK.

APPLIOATION FILED JULY 7, 1908.

925,882. Pa-tnted June 22, 1909.

EDWARD J. DWYER, OF WORCESTER, MASSACHUSETTS.

BLIND-LOCK.

Specification of Letters Patent.

Serial No. 442,280.

Application filed July '7, 1908.

once particularly to Fig. l: it will be seen that this ring is held bythese slots in such a manner that it normally hangs away down below thesupport.

\V hen the blind is swung inwardly in the direction of the arrow in Fig.at the ring will engage the post 10 which will force it up into theposition shown in dotted lines. This is possible because the ring isfree to swing upwardly in the long slot. As soon as the ring is beyondthe post 10 it will drop back by gravity into the position shown in fulllines and then if the blind tends to swing outwardly contrary to thearrow, the post 10 will engage the ring but this time it cannot force iteither outwardly or upwardly because the short slot let engages the ringon both sides and forms a positive stop To all whom it may concern:

Be it known that I, Enwann J. Dwrnn, a citizen of the United States,residing at l/Vorcester, in the county of Worcester and State ofMassachusetts, have invented a new and useful Blind-Lock, of which thefollowing is a specification.

This invention relates to a latch or look capable of general use butparticularly adapted for blinds.

The principal objects of the invention are to construct a simpler lockor latch than has heretofore been provided which will be absolutely surein operation and which will have no parts which are likely to get out oforder in use. This is accomplished by doing away with the springsordinarily employed and depending upon gravity for operating the lockingparts.

The invention also involves certain details of construction which areadapted for the purpose of accomplishing these results.

Further objects and advantages of the invention will appear hereinafter.7

Reference is to be had to the accompanying drawings in which- Figure 1is a front elevation of a portion of a window shown with the blind openand with this invention applied thereto. Fig. 2 is a sectional view ofthe window showing the blind in end elevation. Fig. 3 is a plan of thelocking device on a larger scale, and Fig. 4 an elevation thereof.

The invention although capable of general use will be describedparticularly with reference to its use on a blind. For this purpose thewindow sill and the house are each pro vided with a stationary post orstaple 10. This may be of any ordinary or usual construction. On theblind is mounted a support 11 which is preferably of sheet metal andwhich is provided with two downwardly extending stops 12 which mayconveniently be made integral with the support by turning down the partwhich comes from a pair of long slots 13 therein. These stops aredesigned to engage the posts or staples 10 of the sill and house,respectively and the latter are made of such height as to come justunder the bottom of the support when the blind is swung toward them. Inaddition to the long perforation 13 there is a short perforation or slot1 1 located in line therewith and beyond it. These perforations areseparated by a cross bar 15 which supports the gravity wire locking ring16. By referagainst outward and upward motion. It will be seen,therefore, that the ring can move upwardly when acted upon by aninwardly directed horizontal force but cannot move upwardly when actedupon by an outwardly directed horizontal force, the terms inwardly andoutwardly being used as designating the direction from the center of theblind. This is brought about by the use of the outer short slot orperforation and the inner long one, in one of which the leg of the ringis free to rise and in the other it is held against such motion. It willbe noticed that one end 17 of the support is shown as higher than theother end 18. This is merely to indicate different forms of constructionwhich can be employed in accordance with such conditions as happen toexist, especially as to the height of the post or staple 10.

I am aware that many modifications may be made in the device and thatthe form illustrated may be changed in various ways both when applied tothe locking of blinds and when used for other purposes, withoutdeparting from the scope of the invention as expressed in the claims.Therefore, I do not wish to be limited to all the details ofconstruction shown but \Vhat I do claim is 1. In a gravity fasteningdevice, the combination of a sheet metal support having an integral stopthereon in the form of a downwardly extending tongue, and a projectionbeyond said stop having a long perforation, a short perforation beyondthe long perforation and in line therewith, and a cross bar separatingsaid perforations, a

Patented June 22, 1909.

Wire ring resting on said cross bar and hanging freely through saidperforations and a fixed post or staple in position to engage said ringto cause it to swing upwardly in the long perforation when the ringmoves against it from the front and to engage the front of the ring whenit drops back, Where by said support will freely move over the post orstaple in one direction and the ring will then drop into position toprevent its moving back.

2. In a blind latch, the combination of a sipport having openings, agravity fastensupport and de- 1 mg device carried by sald pendingtherefrom through the openings, and a rigid stop extending downwardlyfrom the support and forming "a part thereof whereby When the supportmoves in one direction and the gravity fastening device engages anobstruction it will be forced upwardly so as to allow it to pass overthe obstruction until the obstruction engages said stop and whereby aforce against the fastening device in the opposite direction will bindit to the support and prevent its moving upwardly thereon.

3. As an article of manufacture, a blind latch comprising a flat stripof sheet metal adapted to be fastened to the bottom of a blind or thelike one end being in a higher plane than the remainder and having along and a short perforation on each end, and two gravity fasteningdevices one hanging through said perforations on each end.

4. As an article of manufacture, a latch comprising a support formed ofa strip of sheet metal, having a long perforation and a shortperforation in line therewith, an integral cross bar separating saidopenings, and of the same thickness as the rest of the support, and agravity fastening device resting on said cross bar and hanging freelythrough said openings.

5. A latch comprising a one-piece sheet metal support having a longopening, a short opening in line with the long opening, an integralcross bar separating said openings and an integral stop formed frommetal punched out in forming the long opening and bent down, and agravity fastening device resting on said cross bar and hanging freelythrough said openings.

In testimony whereof I have hereunto set my hand, in the presence of tWosubscribing witnesses.

EDl/VARD J. DI/VYER.

Witnesses:

A. E. FAY, C. FORREST WEssoN.

